panic: index out of range when try to .cols("xxx", "xxx", "xxx").find(&map[int64]*xxx)

[SilverChard]

xorm/session_find.go

Line 316 in b78ac8c

return convertAssign(dst, pk[0])

in session_find.go:259 ~ 271

containerValueSetFunc = func(newValue *reflect.Value, pk core.PK) error {
	keyValue := reflect.New(keyType)
	err := convertPKToValue(table, keyValue.Interface(), pk)
	if err != nil {
		return err
	}
	if isPointer {
		containerValue.SetMapIndex(keyValue.Elem(), newValue.Elem().Addr())
	} else {
		containerValue.SetMapIndex(keyValue.Elem(), newValue.Elem())
	}
	return nil
}	

session_find.go:306 containerValueSetFunc(&newValue, nil) . pk will be nil.
but in convertPKToValue. return convertAssign(dst, pk[0])
so ... nil[0] ....